`ifndef SEVEN_SEG_H_SV
`define SEVEN_SEG_H_SV

module seven_seg(
input logic [3:0] num, 
input logic [0:0] rbi_inv, 
output logic [7:0] segments);

	always_comb begin
		case (num)
			4'b0000: segments = (rbi_inv) ? ~(8'b01111111) : ~(8'b00000000); // zero or blank
			4'b0001: segments = ~(8'b00001101);
			4'b0010: segments = ~(8'b10110111);
			4'b0011: segments = ~(8'b10011111);
			4'b0100: segments = ~(8'b11001101);
			4'b0101: segments = ~(8'b11011011);
			4'b0110: segments = ~(8'b11111011);
			4'b0111: segments = ~(8'b00001111);
			4'b1000: segments = ~(8'b11111111);
			4'b1001: segments = ~(8'b11001111);
			4'b1010: segments = ~(8'b11101111);
			4'b1011: segments = ~(8'b11111001);
			4'b1100: segments = ~(8'b01110011);
			4'b1101: segments = ~(8'b10111101);
			4'b1110: segments = ~(8'b11110011);
			4'b1111: segments = ~(8'b11100011);
			default: segments = ~(8'bxxxxxxxx);
		endcase     
	end
endmodule

module seven_seg_2digit(
input logic [3:0] b,			// left
input logic [3:0] a,			// right
output logic [7:0] seg_b,	// left
output logic [7:0] seg_a); // right
	
	// seg_b
	seven_seg left_digit(
		.num(b),
		.rbi_inv(1'b0), // blanking enabled
		.segments(seg_b)
	);
	
	// seg_a
	seven_seg right_digit(
		.num(a),
		.rbi_inv(1'b1), // blanking disabled
		.segments(seg_a)
	);

endmodule
`endif